CN115143191A - Waterproof and oilproof sealed bearing - Google Patents

Waterproof and oilproof sealed bearing Download PDF

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Publication number
CN115143191A
CN115143191A CN202210728893.6A CN202210728893A CN115143191A CN 115143191 A CN115143191 A CN 115143191A CN 202210728893 A CN202210728893 A CN 202210728893A CN 115143191 A CN115143191 A CN 115143191A
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CN
China
Prior art keywords
ring
groove
bearing
sealing ring
annular
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Pending
Application number
CN202210728893.6A
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Chinese (zh)
Inventor
邹亚霜
陈江
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Chongqing Cxcl Bearing Co ltd
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Chongqing Cxcl Bearing Co ltd
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Priority to CN202210728893.6A priority Critical patent/CN115143191A/en
Publication of CN115143191A publication Critical patent/CN115143191A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention discloses a waterproof and oilproof sealed bearing, the outer side surface of the inner ring of the bearing comprises a middle outer circular surface, two edges of the middle outer circular surface are sequentially connected with an inner sealing ring groove and an end part outer circumferential surface axially outwards, the outer diameter of the end part outer circumferential surface is smaller than that of the middle outer circular surface, the outer ring of the bearing is provided with an outer sealing ring groove, a sealing ring is arranged in the area between the inner sealing ring groove and the outer sealing ring groove, the inner edge of the sealing ring is provided with an elastic inner attaching part matched with the inner sealing ring groove, the inner attaching part comprises a first inner lip and a second inner lip which are arranged in a V shape, the first inner lip extends towards the inner groove wall of the inner sealing ring groove and is in interference fit with the inner sealing ring groove, the second inner lip extends towards the end part outer circumferential surface and is in interference fit with the end part outer circumferential surface, and the interference magnitude is 0.15-0.20 mm; the radial clearance of the bearing is 0.003-0.018 mm. The invention has the beneficial effects that: through the reasonable matching of the sealing structure, parameter design and machining precision, the bearing has excellent sealing performance.

Description

Waterproof and oilproof sealed bearing
Technical Field
The invention belongs to the technical field of rotating machinery, and particularly relates to a waterproof and oilproof sealed bearing.
Background
A bearing is one of the most basic and important parts of a mechanical rotating structure. A rolling support system consisting of a cage, balls and grease is generally provided between the inner and outer races of the bearing to reduce friction and maintain rotational stability. The inner ring and the outer ring of the bearing can be opened, shielded by dust, sealed and the like. In some application scenes, the sealing performance requirement between the inner ring and the outer ring of the bearing is high. The bearing seal can be divided into a contact seal and a non-contact seal according to the sealing form, and can be divided into a dustproof seal, a liquid seal and a gas seal according to the sealing requirement. Some mechanical products require the bearing to have waterproof and oil-proof liquid sealing effects under static and dynamic conditions due to complex use scenes. In the prior art, for example, patent document CN209483817U discloses a novel dustproof and waterproof bearing, wherein a V-shaped clamping groove is formed in each of a bearing inner ring and a bearing outer ring, a sealing ring is clamped inside the V-shaped clamping groove, a fixing protrusion is arranged on the outer edge of the sealing ring, and three sealing lips are arranged on the inner edge of the sealing ring, so that a fine dustproof and waterproof function is achieved, and the bearing is suitable for a currency detector. However, the currency detector belongs to small-sized machinery, the load is very small when the bearing works, and the liquid sealing performance of the existing bearing is still to be improved for medium-sized and large-sized machinery with large load.
Disclosure of Invention
In view of this, the present invention provides a waterproof and oilproof sealed bearing.
The technical scheme is as follows:
the utility model provides a waterproof oil-proof sealed bearing, the inner circle lateral surface of this bearing includes the outer disc in middle part, and the both sides edge axial of the outer disc in this middle part has outwards connected gradually inner seal annular and tip outer peripheral face, the external diameter of tip outer peripheral face is less than the external diameter of the outer disc in middle part, the outer circle inner cylinder face both ends of bearing are seted up respectively with the outer seal annular that the inner seal annular corresponds, install the sealing washer in the region between inner seal annular and the outer seal annular, the sealing washer includes annular body, this annular body outer fringe be provided with outer laminating portion of outer seal annular complex, this annular body inner fringe be provided with laminating portion in the elasticity of inner seal annular complex, its key lies in,
the inner attaching part comprises a first inner lip and a second inner lip which are connected with the inner edge of the annular body and are arranged in a V shape, wherein the first inner lip extends towards the inner groove wall of the inner sealing ring groove and is in interference fit with the inner groove wall, the second inner lip extends towards the outer peripheral surface of the end part and is in interference fit with the outer peripheral surface, and the interference magnitude is 0.15-0.20 mm;
the radial clearance of the bearing is 0.003-0.018 mm.
Preferably, the radial runout of the inner ring is not more than 0.01mm, and the radial runout of the outer ring is not more than 0.02mm;
the end face runout of the inner ring is smaller than or equal to 0.02mm, and the end face runout of the outer ring is smaller than or equal to 0.04mm.
Preferably, the edge of the second inner lip abuts against the joint of the outer peripheral surface of the end part and the outer groove wall of the inner seal ring groove.
Preferably, the groove width of the inner seal ring groove gradually increases from the groove bottom to the groove opening, wherein the inner groove wall is offset inward by an angle α in the axial direction 1 The outer slot wall being offset axially outwardly by an angle alpha 2 ，2°<α 1 <4°，25°<α 2 <40°。
Preferably, the inner edge of the annular body is further provided with a limit ring axially extending towards the inner raceway direction of the inner ring, the outer circumferential surface of the limit ring is in clearance fit with the outer circumferential surface of the middle part, and the joint of the limit ring and the first inner lip forms an included angle beta 1 ，60°<β 1 <70°；
An included angle beta is formed between the first inner lip and the second inner lip 2 ，110°<β 2 <130°；
The joint of the second inner lip and the side surface of the annular body back to the ball forms a V-shaped annular groove with a V-shaped section, and the included angle between two walls of the V-shaped annular groove is beta 3 ，90°<β 3 <100°。
Preferably, the width of the groove bottom of the inner sealing ring groove is 0.8mm, and the diameter of the groove bottom of the inner sealing ring groove is 16.547-16.577 mm;
the thickness variation between the inner raceway on the inner ring and the inner hole surface of the inner ring is Ki =0.006mm;
and the thickness variation Ke between the outer raceway on the outer ring and the outer surface of the outer ring is =0.012mm.
Preferably, the edges of the first inner lip and the second inner lip are radially flat, and the aperture of the inner hole is 17.68-17.72 mm;
the radial thickness of the edge of the first inner lip is 0.27-0.33 mm;
the radial thickness of the edge of the second inner lip is 0.22-0.28 mm.
Preferably, the outer diameter of the retainer ring is 19.48 to 19.52mm,
the outer diameter of the sealing ring is 32.36-32.44 mm, and the inner diameter of the groove bottom of the outer sealing ring groove is 32.3-32.4 mm.
Preferably, the annular body comprises an annular bracket and a rubber ring coated on the annular bracket, and the inner edge and the outer edge of the rubber ring are respectively and integrally formed with the inner attaching part, the outer attaching part and the limiting ring;
the rubber ring, the inner fit portion, the outer fit portion and the limiting ring are made of nitrile rubber.
Compared with the prior art, the invention has the beneficial effects that: through reasonable sealing structure and parameter design and matching with machining precision, the sealing surface is compact in matching, the bearing rotation precision is high, the sealing performance is excellent, and the bearing sample designed by the invention is excellent in static waterproof performance test and dynamic oil-proof performance test.
Drawings
FIG. 1 is a schematic view of the construction of a bearing of the present invention;
FIG. 2 is an enlarged view of the portion m in FIG. 1;
FIG. 3 is a schematic structural diagram of a bearing inner race;
FIG. 4 is a schematic structural view of a seal ring;
fig. 5 is an enlarged view of the portion n in fig. 4.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
The utility model provides a waterproof oil-proof sealed bearing, 2 lateral surfaces of inner circle of this bearing include the outer disc 21 in middle part, and the both sides edge axial of the outer disc 21 in this middle part has outwards connected gradually interior seal annular 20 and tip outer peripheral face 22, the external diameter of tip outer peripheral face 22 is less than the external diameter of the outer disc 21 in middle part, the notch of interior seal annular 20 respectively with the outer disc 21 in middle part and tip outer peripheral face 22 are connected, 1 interior cylinder both ends in the outer lane of bearing 1 seted up respectively with the external seal annular 10 that interior seal annular 20 corresponds, interior seal annular 20 with install sealing washer 3 in the region between the external seal annular 10, sealing washer 3 includes annular body 30, this annular body 30 outer fringe be provided with external laminating portion of external seal annular 10 complex, this annular body 30 inner edge be provided with the interior laminating portion of internal seal annular 20 complex elasticity. The sealing ring 3 is assembled between the inner ring 2 and the outer ring 1, the positioning of the sealing ring 3 and the sealing between the outer joint part and the outer sealing ring groove 10 can be realized, and the part of the structure can meet the common sealing requirement by using the existing structure. Therefore, the fit between the seal ring 3 and the inner ring 2 is critical.
Interior laminating portion is including connecting two first interior lips 31 and the second interior lip 32 that are the V font setting of annular body 30 inner edge, wherein first interior lip 31 to cell wall stretches out and rather than interference fit in the internal seal annular 20, second interior lip 32 to tip outer peripheral face 22 stretches out and rather than interference fit, and the magnitude of interference is 0.15 ~ 0.20mm. The radial clearance of the bearing is 0.003-0.018 mm.
The radial play of the bearing has a great influence on the sealing effect, and the proper matching of the radial play and the interference helps to maintain the sealing effect of the bearing, particularly the sealing performance in a rotating state.
Furthermore, the radial runout of the inner ring 2 is not more than 0.01mm, and the radial runout of the outer ring 1 is not more than 0.02mm. The end face runout of the inner ring 2 is smaller than or equal to 0.02mm, and the end face runout of the outer ring 1 is smaller than or equal to 0.04mm. The radial run-out and the end face run-out are controlled, so that the bearing can be controlled to be kept at a higher rotation precision level, and the bearing sealing performance can be improved.
In one embodiment, the edge of the second inner lip 32 abuts the junction of the end peripheral surface 22 and the outer groove wall of the inner seal ring groove 20. Thus, due to the elastic deformability of the second inner lip 32, the edge thereof can be simultaneously fitted to both faces of the joint, further improving the sealing property.
The extending directions of the first inner lip 31 and the second inner lip 32 are mutually separated, and the strength of the first inner lip 31 and the second inner lip 32 respectively attached to the inner sealing ring groove 20 is improved, so that the stability is improvedThe groove width of the sealing ring groove 20 increases from the groove bottom to the groove opening, wherein the inner groove wall is offset axially inward by an angle α 1 The outer slot wall being offset axially outwardly by an angle α 2 ，2°<α 1 <4°，25°<α 2 <40 degrees. In addition to improving contact stability, angle α is maintained 2 At a suitable angle, it is also advantageous for the first inner lip 31 and the second inner lip 32 to enter from the outer end of the bearing when the seal ring is installed.
In order to improve the installation stability of the sealing ring 3 and prevent the inner joint part of the sealing ring 3 from excessively deviating towards the ball direction during installation and bearing operation, the inner edge of the annular body 30 is further provided with a limiting ring 33 axially extending towards the inner raceway direction of the inner ring 2, and the outer circumferential surface of the limiting ring 33 is in clearance fit with the middle outer circumferential surface 21.
The included angle of the connection part of the limiting ring 33 and the first inner lip 31 is beta 1 ，60°<β 1 <70 degrees; an included angle beta is formed between the first inner lip 31 and the second inner lip 32 2 ，110°<β 2 <130 °; the second inner lip 32 and the side surface of the annular body 30 back to the rolling balls form a V-shaped annular groove 34 with a V-shaped section, and the included angle between two walls of the V-shaped annular groove 34 is beta 3 ，90°<β 3 <100°。
The included angle of the joints is kept at a proper size, so that the rigidity of the joints of the first inner lip 31, the second inner lip 32 and the annular body 30 can be kept at a proper size, the joints and the inner sealing ring groove 20 are in an elastic contact state, and the deformability of the first inner lip 31 and the second inner lip 32 can be kept to be always attached to the inner sealing ring groove 20 when the inner ring 2 and the outer ring 1 are subjected to radial run-out and axial run-out.
For a 6301 2RS type bearing, the width of the groove bottom of the inner seal ring groove 20 is 0.8mm, and the diameter of the groove bottom of the inner seal ring groove 20 is 16.547-16.577 mm. The edges of the first inner lip 31 and the second inner lip 32 are radially flat, and the aperture of the inner hole is 17.68-17.72 mm. The radial thickness of the edge of the first inner lip 31 is 0.27 to 0.33mm. The radial thickness of the edge of the second inner lip 32 is 0.22-0.28 mm. The outer diameter of the limiting ring 33 is 19.48-19.52 mm.
The outer diameter of the sealing ring 3 is 32.36-32.44 mm, and the inner diameter of the groove bottom of the outer sealing ring groove 10 is 32.3-32.4 mm. The thickness variation between the inner raceway on the inner ring 2 and the inner bore surface thereof is Ki =0.006mm, and the thickness variation Ke between the outer raceway on the outer ring 1 and the outer surface thereof is 0.012mm.
For the 6301 2RS type bearing, α 1 ＝3°，α 2 ＝30°，β 1 ＝65°，β 2 ＝120°，β 3 ＝95°。
The annular body 30 includes an annular support 301 maintaining its shape, and a rubber ring 302 covering the annular support 301, wherein the inner edge and the outer edge of the rubber ring 302 are integrally formed with the inner attaching portion, the outer attaching portion, and the stopper ring 33, respectively. The rubber ring 302, the inner fitting portion, the outer fitting portion and the limit ring 33 are made of nitrile rubber.
And (3) taking the 6301 2RS type bearing sample to carry out a tightness test, wherein the bearing sample is subjected to a tolerance grade P6, and the test is divided into a static test and a dynamic test. From 18000 sets of products, 10 sets of samples were randomly taken for static testing and 8 sets of products were dynamically tested. The test is carried out by adopting self-made equipment.
And (3) static testing: the marking pen is used for marking the sample sealing ring with numbers from 1# to 10# in sequence. At normal temperature, the sample is lightly put into a water tank filled with tap water, and any end face of the bearing is kept upward. The sample was immersed in a 1000mm water depth for 180min. Then the bearing is taken out, the surface moisture of the bearing is lightly wiped by a paper towel, one sealing ring is sequentially removed by being horizontally placed on white paper according to the number, and whether water exists in the bearing is observed.
After the test is finished, one example of water is not found in all 10 sets of bearing samples, and the sealing performance of the bearing is judged to be waterproof and qualified.
And (3) dynamic testing: the marking pen is used for marking the sample sealing ring with numbers from 1# to 8# in sequence. Four bearings are carefully pressed on a round rod-shaped test shaft in each test, the test shaft is arranged in a test chamber of test equipment and is connected with a driving device, and the test chamber is filled with N32 lubricating oil. The test is carried out at normal temperature, and the testing machine drives the bearing to continuously rotate for 180min at the rotating speed of 3000 r/min. The test bearing is then removed from the test machine and the bearing is removed from the test shaft with a special tool. And wiping the oil stain on the surface of the disassembled bearing with a paper towel, flatly placing the bearing on white paper, sequentially removing a cover according to the number, and observing whether the lubricating oil enters the bearing channel.
After the test is finished, lubricating oil does not enter all 8 sets of bearing samples, and the oil-proof performance of the bearing samples is judged to be qualified.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims (9)

1. The utility model provides a waterproof oil-proof sealed bearing, the inner circle (2) lateral surface of this bearing includes middle part outer disc (21), and the both sides edge axial of this middle part outer disc (21) has outwards connected gradually inner seal annular (20) and tip outer peripheral face (22), the external diameter of tip outer peripheral face (22) is less than the external diameter of middle part outer disc (21), the outer lane (1) inner cylinder face both ends of bearing seted up respectively with outer seal annular (10) that inner seal annular (20) correspond, inner seal annular (20) with install sealing washer (3) in the region between outer seal annular (10), sealing washer (3) include annular body (30), this annular body (30) outer fringe be provided with outer laminating portion of outer seal annular (10) complex, this annular body (30) inner edge be provided with laminating portion in inner seal annular (20) complex elasticity, its characterized in that:
the inner attaching part comprises two first inner lips (31) and two second inner lips (32) which are connected to the inner edge of the annular body (30) and arranged in a V shape, wherein the first inner lips (31) extend out of the inner groove wall of the inner sealing ring groove (20) and are in interference fit with the inner groove wall, the second inner lips (32) extend out of the outer peripheral surface (22) of the end part and are in interference fit with the outer peripheral surface, and the interference magnitude is 0.15-0.20 mm;
the radial clearance of the bearing is 0.003-0.018 mm.
2. The waterproof and oilproof sealed bearing of claim 1, wherein: the radial runout of the inner ring (2) is not more than 0.01mm, and the radial runout of the outer ring (1) is not more than 0.02mm;
the end face runout of the inner ring (2) is smaller than or equal to 0.02mm, and the end face runout of the outer ring (1) is smaller than or equal to 0.04mm.
3. The waterproof and oilproof sealed bearing of claim 1, wherein: the edge of the second inner lip (32) abuts against the connection part of the end part outer peripheral surface (22) and the outer groove wall of the inner sealing ring groove (20).
4. The waterproof and oilproof sealed bearing of claim 1, wherein: the groove width of the inner sealing ring groove (20) is gradually increased from the groove bottom to the direction of the groove opening, wherein the inner groove wall is inwards deviated by an angle alpha along the axial direction 1 The outer slot wall being offset axially outwardly by an angle alpha 2 ，2°<α 1 <4°，25°<α 2 <40°。
5. The waterproof and oilproof sealed bearing of claim 4, wherein: the inner edge of the annular body (30) is also provided with a limit ring (33) axially extending towards the inner raceway direction of the inner ring (2), the outer circumferential surface of the limit ring (33) is in clearance fit with the middle outer circumferential surface (21), and the joint of the limit ring (33) and the first inner lip (31) forms an included angle beta 1 ，60°<β 1 <70°；
An included angle beta is formed between the first inner lip (31) and the second inner lip (32) 2 ，110°<β 2 <130°；
The second inner lip (32) and the side connecting part of the annular body (30) back to the ball form a V-shaped annular groove (34) with a V-shaped section, and the included angle between two walls of the V-shaped annular groove (34) is beta 3 ，90°<β 3 <100°。
6. The waterproof and oilproof sealed bearing of claim 5, wherein: the width of the groove bottom of the inner sealing ring groove (20) is 0.8mm, and the diameter of the groove bottom of the inner sealing ring groove (20) is 16.547-16.577 mm;
the thickness variation between the inner roller way on the inner ring (2) and the surface of the inner hole is Ki =0.006mm;
the thickness variation Ke between the outer raceway on the outer ring (1) and the outer surface of the outer ring is =0.012mm.
7. The waterproof and oilproof sealed bearing of claim 6, wherein: the edges of the first inner lip (31) and the second inner lip (32) are radially flat, and the aperture of an inner hole of the first inner lip is 17.68-17.72 mm;
the radial thickness of the edge of the first inner lip (31) is 0.27-0.33 mm;
the radial thickness of the edge of the second inner lip (32) is 0.22-0.28 mm.
8. The waterproof and oilproof sealed bearing of claim 6, wherein: the outer diameter of the limiting ring (33) is 19.48-19.52 mm,
the outer diameter of the sealing ring (3) is 32.36-32.44 mm, and the inner diameter of the groove bottom of the outer sealing ring groove (10) is 32.3-32.4 mm.
9. The waterproof and oilproof sealed bearing of claim 1, wherein: the annular body (30) comprises an annular support (301) and a rubber ring (302) coated on the annular support (301), and the inner edge and the outer edge of the rubber ring (302) are respectively and integrally formed with the inner attaching part, the outer attaching part and the limiting ring (33);
the rubber ring (302), the inner fitting portion, the outer fitting portion and the limiting ring (33) are made of nitrile rubber.
CN202210728893.6A 2022-06-24 2022-06-24 Waterproof and oilproof sealed bearing Pending CN115143191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210728893.6A CN115143191A (en) 2022-06-24 2022-06-24 Waterproof and oilproof sealed bearing

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Application Number Priority Date Filing Date Title
CN202210728893.6A CN115143191A (en) 2022-06-24 2022-06-24 Waterproof and oilproof sealed bearing

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005054909A (en) * 2003-08-05 2005-03-03 Nsk Ltd Sealed anti-friction bearing
JP2008175312A (en) * 2007-01-19 2008-07-31 Nsk Ltd Rolling bearing with seal
JP2010038353A (en) * 2008-08-08 2010-02-18 Nsk Ltd Roller bearing
CN201627828U (en) * 2009-12-24 2010-11-10 纽尚(宁波)汽车轴承制造有限公司 Dynamic compensating type bearing sealing structure
CN201651073U (en) * 2010-03-22 2010-11-24 浙江八环轴承有限公司 Bearing dustproof waterproof sealing ring
CN205226094U (en) * 2015-12-21 2016-05-11 八环轴承（长兴）有限公司 Car take -up pulley double column angular contact ball bearing
CN106090027A (en) * 2016-08-08 2016-11-09 浙江天马轴承有限公司 A kind of sealing ring sealing self-aligning roller bearing
CN211901309U (en) * 2020-04-14 2020-11-10 浙江神龙轴承有限公司 Waterproof low-energy-consumption bearing sealing ring
CN212959552U (en) * 2020-07-09 2021-04-13 无锡华洋滚动轴承有限公司 Sealing structure of bearing for belt pulley of decoupler built in automobile generator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005054909A (en) * 2003-08-05 2005-03-03 Nsk Ltd Sealed anti-friction bearing
JP2008175312A (en) * 2007-01-19 2008-07-31 Nsk Ltd Rolling bearing with seal
JP2010038353A (en) * 2008-08-08 2010-02-18 Nsk Ltd Roller bearing
CN201627828U (en) * 2009-12-24 2010-11-10 纽尚(宁波)汽车轴承制造有限公司 Dynamic compensating type bearing sealing structure
CN201651073U (en) * 2010-03-22 2010-11-24 浙江八环轴承有限公司 Bearing dustproof waterproof sealing ring
CN205226094U (en) * 2015-12-21 2016-05-11 八环轴承（长兴）有限公司 Car take -up pulley double column angular contact ball bearing
CN106090027A (en) * 2016-08-08 2016-11-09 浙江天马轴承有限公司 A kind of sealing ring sealing self-aligning roller bearing
CN211901309U (en) * 2020-04-14 2020-11-10 浙江神龙轴承有限公司 Waterproof low-energy-consumption bearing sealing ring
CN212959552U (en) * 2020-07-09 2021-04-13 无锡华洋滚动轴承有限公司 Sealing structure of bearing for belt pulley of decoupler built in automobile generator

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